Abstract Detail


Simpson, Andrew [1], Wing, Scott [2], Fenster, Charles [3].

A biogeographic history of the Rosaceae (Anthophyta: Eudicotyledonae) using phylogeographic and fossil reconstruction methods.

Understanding the geographic origins of biodiversity is one of the goals of historical biogeography. Phylogenetic data and comparative phylogenetic methods are used to predict the location of where clades diversify, but inferences made by these methods can be misled by paleoclimatic variation, extinction, and other factors that such methods cannot realistically account for. Fossil assemblages can give us real paleodistributions, but are themselves snapshots of paleobiogeography, only allowing us to bracket where and when diversification happened.
The Rosaceae (Anthophyta: Eudicotyledonae) today have a worldwide distribution and are common in temperate and subpolar climates, and also in tropical habitats at high altitude. Additionally, the Rosaceae constitute one of the more common families in the Cenozoic fossil record. We use the R package BioGeoBEARS (Matzke 2013) to compare the phylogeography of the living Rosaceae to the family’s fossil record compiled from the literature.
Preliminary results, using a dispersal-extinction-cladogensis model, suggest that the Rosaceae originated in North America during the Paleocene, and that many of its lineages spread to Europe and elsewhere by the Eocene. The plant fossil record is heavily biased in favor of North America and Europe, but the fact that our analysis seems to indicate a North American and not European diversification of the family does suggest that this result may transcend the bias. Further analyses with different models are underway.

1 - Department Of Paleobiology, National Museum Of Natural History, Smithsonian Institution, Washington, DC, 20560, United States
2 - Smithsonian Institution, Dept. Of Paleobiology NHB 121, PO Box 37012, Washington, DC, 20013, United States
3 - Dept Biology-Hj Patterson Hall, University Of Maryland, College Park, MD, 20742, United States


Presentation Type: Oral Paper
Number: BIOG III005
Abstract ID:316
Candidate for Awards:None

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